I just had a major problem with Cubase 9 crashing and making another save file that was called “Projectname”-01,-02 and so on. After this happened I could not open the projects in Cubase 9 any more. It said that this project was created in Cubase version 1.x and can not be opened.
A BIG thanks to Martin Jirsak who checked out my crash reports and suspected that it had something to do with tempo and time signature!
And that was the problem… I had imported signature and tempo track from a cubase 8.5 project…
What I did to fix it was to open it in 8.5, delete all tempo information and back it up to a new folder.
After that, Cubase 9 was stable again
So just a heads up if you are planning on importing tempo information from older projects, DON’T do it yet